IMAP Backup Tool — Technical Specs

System requirements, supported formats and trial limit for IMAP Backup Tool.

System Hardware & OS Support Matrix

Operating System Windows 11, Windows 10, Windows 8.1, Windows 7, Windows Server 2022/2019/2016, macOS Sequoia (15), macOS Sonoma (14), macOS Ventura (13), Apple Silicon M1/M2/M3/M4, Intel x86-64

Processor / CPU See the download page for current requirements

Memory (RAM) See the download page for current requirements

Disk Installation Space See the download page for current requirements

Deep Architecture Specifications

Source Protocol & Server Connectivity

Supported Mail Protocols IMAP4rev1 (RFC 3501), IMAP4 (RFC 1730), POP3-to-IMAP, MIME (RFC 2045-2049)

Port & Encryption Handshake Port 993 (Explicit SSL/TLS), Port 143 (STARTTLS or Plain), Custom non-standard ports

Server Compatibility cPanel Webmail, Zimbra, Dovecot, Postfix, Kerio, MDaemon, Exchange IMAP, IceWarp, Zoho

Authentication Methods App-Specific Passwords (with auto-sanitization of Unicode whitespace & dashes), Modern OAuth 2.0 PKCE, Plain, Cram-MD5

Batch Ingestion Mode CSV Multi-Account Queue for bulk enterprise mailbox discovery and concurrent archival

Export & Storage Destinations

Desktop Container Targets Outlook Unicode PST (64-bit), MBOX (RFC 4155), EML (RFC 822), MSG (Compound Binary), EMLX

Document & Forensic Formats Adobe PDF/A (with Bates stamping and embedded attachments), HTML5, MHTML, RTF, CSV, TXT

Direct Cloud Ingestion Microsoft 365 (via Microsoft Graph API) and Google Workspace / Gmail (via OAuth 2.0 PKCE)

PST Output Splitting Auto-splits output PST files at 2 GB, 5 GB, 10 GB, 20 GB, or 50 GB file size thresholds

Attachment Handling Retain inline, embed in PDF portfolio, save to disk subfolder, or filter by file extension/size

Engine Performance & Resilience

Resume Center Ledger ACID-compliant local SQLite checkpoint database prevents re-downloading existing messages

Deduplication Engine MD5 / SHA-256 cryptographic hash matching calculated over Message-ID, Body, and Timestamp

Automation Switches Headless CLI automation mode (/SILENT /CONFIG=backup.json) for scheduled nightly cron tasks

Security & Data Handling

Data Privacy Boundary Processing runs on your computer. Data goes only to the mail provider or cloud destination you choose.

Supported Source & Target Formats

Input Source Formats (0)

Input formats and direct connection sources are documented in the product guide.

Output Target Destinations (0)

Export destinations and target profiles are documented in the product guide.

Free trial limit

50 items per folder

The free trial exports up to 50 items per folder so you can verify conversion fidelity before purchasing.

Download Free Trial

Test performance on your hardware with a 50-item preview export limit.

Download Trial Installer